Cooling System: Description and Operation

DESCRIPTION-COOLING SYSTEM FLOW 4.7L ENGINE





The cooling system consists of:
^ Radiator
^ Cooling fan (mechanical/Electrical)
^ Thermal viscous fan drive
^ Fan shroud
^ Radiator pressure cap
^ Thermostat
^ Coolant reserve/overflow system (integral to upper fan shroud)
^ Transmission oil cooler (if equipped with an automatic transmission)
^ Coolant
^ Water pump
^ Hoses and hose clamps

DESCRIPTION-HOSE CLAMPS
The cooling system utilizes both worm drive and spring type hose clamps. If a spring type clamp replacement is necessary, replace with the original Mopar equipment spring type clamp.





CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only a original equipment clamp with matching number or letter.

OPERATION-COOLING SYSTEM
The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature as quickly as possible. It also maintains normal operating temperature and prevents overheating.

The cooling system also provides a means of heating the passenger compartment and cooling the automatic transmission fluid (if equipped). The cooling system is pressurized and uses a centrifugal water pump to circulate coolant throughout the system.

An optional factory installed maximum duty cooling package is available on most models. This package will provide additional cooling capacity for vehicles used under extreme conditions such as trailer towing in high ambient temperatures.

OPERATION-HOSE CLAMPS
The worm type hose clamp uses a specified torque value to maintain proper tension on a hose connection.

The spring type hose clamp applies constant tension on a hose connection. To remove a spring type hose clamp, only use constant tension clamp pliers designed to compress the hose clamp.